Installing a Module |
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An installable module, which is created by
the ALLBASE/SQL preprocessor before source code is compiled,
contains information that ALLBASE/SQL uses to execute the application
program's SQL statements at run time. The program can only
access the DBEnvironment in which its corresponding module is
stored.
Sometimes you need to transfer a user-written application from
one DBEnvironment to another. For instance, an application created
on a development machine may need to be
transferred to a production system. You would need to unload
the data from one DBEnvironment and then load it into the new
one.
Additionally, to use an application program in a DBEnvironment
different from that in which it was developed, you must move the
executable application program file and the file containing the
installable module to the machine containing the target
DBEnvironment.
To store the installable module in the new
DBEnvironment, use the ISQL INSTALL command:
isql=> INSTALL;
File name> someprog.sqlm;
Name of module in this file: Pgmr1.someprog
Number of sections installed: 6
COMMIT WORK to save to DBEnvironment.
isql=>
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You can use the ISQL LIST INSTALL command to identify the names of the modules contained in an installable module file. For
example:
isql=> LIST INSTALL;
File name> someprog.sqlm;
Name of module in this file: Pgmr1.someproga
Name of module in this file: Pgmr1.someprogb
isql=>
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To copy a module in a DBEnvironment to an installable module file,
use the ISQL EXTRACT command:
isql=> EXTRACT MODULE CEX9 INTO cex9.sqlm;
Extract 6 sections from module CEX9.
Number of modules extracted: 1.
isql=>
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 | NOTE:
A module stored in a DBEnvironment by a preprocessor, or a
module installed using the ISQL INSTALL command, should
never be executed directly from ISQL by typing the name of
the module. The module should be executed by running the
executable program file. |
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For more information on using ALLBASE/SQL programmatically,
refer to the ALLBASE/SQL application programming guide for the
language you are using or to the appropriate ALLBASE/SQL application
programming bulletin.
Modules can be created by the preprocessor or the PREPARE
statement.
The preprocessor inserts a single module into the module installation
files. Several module installation files may be joined
into a single installation file with the
cat command.
The PREPARE statement has an interactive option which
allows creation of a module through ISQL. The EXECUTE statement
can then be used to cause ALLBASE/SQL to execute the statement
that was stored with the PREPARE statement. A module created by
using the PREPARE statement with ISQL cannot be executed by an
application with the preprocessor. For more information on the
PREPARE and EXECUTE statements, refer to the ALLBASE/SQL Reference Manual.
